14 University of Michigan 



wing being strongly angled. Pyguiaeus is described as having 

 the thorax black, a matter in which de Selys could hardly be 

 mistaken because of postmortem changes, yet the Bolivar spec- 

 imens, fully matured, are brown. And the basal abdominal 

 markings present on segments 3-6 in the Bolivar specimens 

 are not mentioned by de Selys, though these may have been 

 lost due to postmortem changes in the single specimen he had. 



ProgoiiipJius clendoni Calvert 



This species has been known from Tuxpan, Mexico (two 

 males — Bio. Cent. Amer.), and from Costa Rica (Calvert, A 

 Year of Costa Rican Natural History, page 429), so its oc- 

 currence in Guatemala is not surprising. But its distribution 

 in Guatemala and the variation shown in the material collected 

 are surprising. I took specimens at Puerto Barrios at approx- 

 imately sea level; at Los Amates, at an elevation of 160 feet; 

 in the mountains at Aqua Caliente and still higher at El Fiscal 

 at an elevation of 3,700 feet, both towns in the Dept. Guate- 

 mala. El Fiscal is near the continental divide but is on the 

 Atlantic side. But when the divide was crossed and collecting 

 was done at Amatitlan, at an elevation of about 4,000 feet on 

 the Pacific slope, clendoni was found there too. I can not ex- 

 plain my failure to find the species at Gualan, between Los 

 Amates and Agua Caliente, where I collected carefully. The 

 dates of captures run from May 28 to June 19, 1909, and alto- 

 gether 13 males were taken. 



In size the Guatemalan material varies from 35 to 41 in 

 length of abdomen and from 27 to 30 in length of hind wing. 

 The size seems to vary independently of locality though more 

 material might show that averages varied for widely separated 

 localities, having very different altitudes. This is indcated by 

 the fact that the largest specmen is from El Fiscal in the 



